radiolaria - rads_cenozoic - Ellipsostylus distachyus radiolaria - rads_cenozoic - Ellipsostylus distachyus

Ellipsostylus distachyus


Classification: rads_cenozoic -> Actinommidae -> Amphisphaeridae -> Ellipsostylus -> Ellipsostylus distachyus
Sister taxa: E. distachyus, E. salebrosus

Taxonomy

Citation: Ellipsostylus distachyus Blueford 1982
Taxonomic rank: species
Basionym: Ellipsostylus distachyus Blueford 1982
Synonyms:
1982 Ellipsostylus distachyus - Blueford pl. 7, figs. 5a-6

From Suzuki Paleotax db:

1982 Ellipsostylus distachyus n. sp. Blueford p. 206, pl. 7, figs. 5a-6

Catalog entries: Ellipsostylus distachyus

Original description: Single shell with average diameter 72 µ. Outer shell thick (10 µ, slightly elongate along polar axis. Two unequal, bladed, polar spines, lengths 24-72 and 5-20 µ. Pores circular, of equal size, 24 µ in diameter, closely packed, 5-8) µ between pore centers.
Remarks on original description: Shorter spines are found in specimens from Site 77. The upper and lower limits are not detectable.
Differs from Druppatractus nanus by only the absence of the inner shell. I first suspected that this difference might represent microspheric and macrospheric forms as in foraminifera. If this is true, then the stratigraphy of each should mirror the other, which is not the case. It is, therefore, appropriate to recognize two different species.[comment from RadWorld database]

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Messinian Stage (5.33-7.25Ma, top in Messinian stage). Data source:
First occurrence (base): within Tortonian Stage (7.25-11.62Ma, base in Tortonian stage). Data source:

Plot of occurrence data:

References:

Blueford, R (1982). Miocene actinommid Radiolaria from the equational Pacific. Micropaleontology. 28(2): 189-213. gs


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Ellipsostylus distachyus compiled by the radiolaria@mikrotax project team viewed: 30-4-2025

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